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The utilisation of waste material in the road


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The utilisation of waste material in the road

  2. 2. INTRODUCTION  Rapid industrialization and large scale infrastructural development in India, has resulted in huge scarcity of construction materials and tremendous increase in the environmental pollution.  Disposal issue of the waste products is a challenge. Some of these materials are not biodegradable and often leads to waste disposal crisis and environmental pollution.
  3. 3. INTRODUCTION  Traditionally soil, stone aggregates, sand, bitumen, cement etc. are used for road construction. Natural materials being exhaustible in nature, its quantity is declining gradually. Also, cost of extracting good quality of natural material is increasing.  Concerned about this, the scientists are looking for alternative materials for road construction. If these waste materials can be suitably utilized in road construction, the pollution and disposal problems may be partly reduced.
  4. 4. OBJECTIVE OF THE PROJECT  The main objective of this project is to detail study about the wastes that can be used as a road construction and pavement construction material.  The suitability of these waste materials is checked and can be helpful as a replacement of fine aggregate in base and bituminous layers of road pavement .  The properties of different waste materials can be studied and their suitability in embankment, sub grade, sub base, base and bituminous layers of road pavement is cheked out.
  5. 5. Waste materials to be used in road construction are:  PLASTICS  WASTE TYRES  CONSTRUCTION AND DEMOLITION WASTES  FLY ASH
  6. 6. PLASTICS  Plastic waste, consisting of carry bags, cups and Thermocoles .  Plastic waste can be used as a coating over aggregate and this coated stone can be used for road construction.  The main function of plastic is to be effectively utilized in construction of flexible pavement as a binder material for replacing the content of bitumen.
  7. 7. PLASTICS  By this process a road of 1 Km length and 3.375M width of single lane can consumes 10, 00000 carry bags and the road strength is increased by 100% and there found no any pot hole.  On the other side, the road traffic is increasing. The load bearing capacities of the road are to be increased. So there is need to take care of both these aspects.
  8. 8. WASTE TYRES  Waste tyres are categorized as solid or hazardous waste.  The use of four wheeler, two wheeler vehicles etc. is increasing day by day. As a result amount of waste tyres also increasing.  It is estimated that about 60 per cent of waste tyres are disposed via unknown routes in the urban as well as rural areas. This leads to various environmental problems which include air pollution associated with open burning of tyres.
  9. 9. WASTE TYRES  So it is necessary to utilize the tyre wastes effectively.  The waste tyres can be used as well sized aggregate in the various bituminous mixes if it is cut in the form of aggregate and can be called as rubber aggregate.  This not only minimizes the pollution occurred due to waste tyres but also minimizes the use of conventional aggregate which is available in less quantity.
  10. 10. CONSTRUCTION AND DEMOLITION WASTE  Construction and demolition waste is generated whenever any construction/demolition activity takes place, such as, building roads, bridges, fly over, subway etc.  It consists mostly of inert and non-biodegradable material such as concrete, plaster, metal, wood, plastics etc.  These wastes are heavy, having high density, often bulky and occupy considerable storage space either on the road or communal waste bin/container.
  11. 11. CONSTRUCTION AND DEMOLITION WASTE  Recycling of aggregate material from construction and demolition waste can be used in road construction replacing the shortage of the aggregate material in the road construction.
  12. 12. FLY ASH  Fly ash is the finely divided residue that results from the combustion of pulverized coal and is transported from the combustion chamber by exhaust gases.  Over 61 million metric tons (68 million tons) of fly ash were produced in 2001.  So it need to be disposed off.  Fly ash can be used in soil and road base stabilization, flowable fills, grouts and structural fill.
  13. 13. FLY ASH Fly ash utilization, especially in concrete roads , has significant environmental benefits including:  Increasing the life of concrete roads and structures by improving concrete durability.  Net reduction in energy use and greenhouse gas and other adverse air emissions when fly ash is used to replace or displace manufactured cement.  Reduction in amount of coal combustion products that must be disposed in landfills.  Conservation of other natural resources and materials.